Data Science

What is an Anomaly?

• A data point that fits the expected trend

• A data point outside of the expected trend

• A data point on a graph

• A data point which sits on a straight line

What is the task to complete in the problem stage?

• Define the problem that needs to be solved and pose questions that can be investigated

• Visualise the data. Spot patterns, trends or correlations

• Find problems in your data set and remove them as soon as possible

• Decide on a problem and answer it immediately

Which is the most accurate definition of data science?

• Data science is extracting meaning from large data sets in order to provide insights to support decision-making

• Data science is using computers to analyse data and to perform calculations on the data to produce information

• Data science is performing experiments and recording the data produced by those experiments

• Data science is writing code to make sure that any inaccuracies in data sets are spotted and removed (cleaned)

Which of the following best describes a data visualisation?

• Presenting related data so that a user can see individual items of data

• Making sure that data is accessible and that no data is hidden

• A visual representation that communicates relationships among the data

• A collection of graphs that tell a story when put together

Is the image a visualisation or an infographic?

• Visualisation

• Infographic

What is meant by a correlation?

• The relationship between two or more variables

• When there is an upward trend in a graph

• When there is a set of data that doesn’t lie in the normal or expected range

• When data is placed in a graph

The visualisation plots life expectancy (y-axis) against time (x-axis). What type of correlation does this visualisation show from 1949 onwards?

• Positive

• Negative

• Neutral

• No Correlation

The graph shows the annual average temperatures recorded by a weather station over a period of 20 years. Identify the outlier in the data.

• A

• B

• C

• D

Which of the following is the correct order of the investigative cycle

• Problem, data, plan, analysis, conclusion

• Conclusion, plan, problem, data, analysis

• Plan, problem, analysis, data, conclusion

• Problem, plan, data, analysis, conclusion

In which step of the cycle would you pose the question(s) that you will use data to help you answer?

• Data

• Analysis

• Plan

• Problem